Mix together beef, rice, salt, pepper, worcestershire sauce and ⅓ cup of the tomato soup. Form into balls about the size of a golf ball. Put the onions and celery around the meatballs and pour the rest of the soup over the vegetables in a baking dish. BAke, covered, in a 350 degree oven for 45 minutes. Remove the cover and continue cooking for 15 minutes more. Serve with wild rice.